2 Thessalonians

For yourselves know how ye ought to follow us: for we behaved not ourselves disorderly among you;

But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.

And have no fellowship with the unfruitful works of darkness, but rather reprove them.

Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.

For even when we were with you, this we commanded you, that if any would not work, neither should he eat.